- 03 Mar, 2016 22 commits
-
-
Siva Reddy Kallam authored
[ Upstream commit b7d98729 ] tg3_tso_bug() can hit a condition where the entire tx ring is not big enough to segment the GSO packet. For example, if MSS is very small, gso_segs can exceed the tx ring size. When we hit the condition, it will cause tx timeout. tg3_tso_bug() is called to handle TSO and DMA hardware bugs. For TSO bugs, if tg3_tso_bug() cannot succeed, we have to drop the packet. For DMA bugs, we can still fall back to linearize the SKB and let the hardware transmit the TSO packet. This patch adds a function tg3_tso_bug_gso_check() to check if there are enough tx descriptors for GSO before calling tg3_tso_bug(). The caller will then handle the error appropriately - drop or lineraize the SKB. v2: Corrected patch description to avoid confusion. Signed-off-by:
Siva Reddy Kallam <siva.kallam@broadcom.com> Signed-off-by:
Michael Chan <mchan@broadcom.com> Acked-by:
Prashant Sreedharan <prashant@broadcom.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
Hans Westgaard Ry authored
[ Upstream commit 5f74f82e ] Devices may have limits on the number of fragments in an skb they support. Current codebase uses a constant as maximum for number of fragments one skb can hold and use. When enabling scatter/gather and running traffic with many small messages the codebase uses the maximum number of fragments and may thereby violate the max for certain devices. The patch introduces a global variable as max number of fragments. Signed-off-by:
Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Reviewed-by:
Håkon Bugge <haakon.bugge@oracle.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
-
Eric Dumazet authored
[ Upstream commit 9cf74903 ] Petr Novopashenniy reported that ICMP redirects on SYN_RECV sockets were leading to RST. This is of course incorrect. A specific list of ICMP messages should be able to drop a SYN_RECV. For instance, a REDIRECT on SYN_RECV shall be ignored, as we do not hold a dst per SYN_RECV pseudo request. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=111751 Fixes: 079096f1 ("tcp/dccp: install syn_recv requests into ehash table") Reported-by:
Petr Novopashenniy <pety@rusnet.ru> Signed-off-by:
-
Hannes Frederic Sowa authored
[ Upstream commit 415e3d3e ] The commit referenced in the Fixes tag incorrectly accounted the number of in-flight fds over a unix domain socket to the original opener of the file-descriptor. This allows another process to arbitrary deplete the original file-openers resource limit for the maximum of open files. Instead the sending processes and its struct cred should be credited. To do so, we add a reference counted struct user_struct pointer to the scm_fp_list and use it to account for the number of inflight unix fds. Fixes: 712f4aad ("unix: properly account for FDs passed over unix sockets") Reported-by:
David Herrmann <dh.herrmann@gmail.com> Cc: David Herrmann <dh.herrmann@gmail.com> Cc: Willy Tarreau <w@1wt.eu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Suggested-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
-
Eric Dumazet authored
[ Upstream commit 44c3d0c1 ] Silence lockdep false positive about rcu_dereference() being used in the wrong context. First one should use rcu_dereference_protected() as we own the spinlock. Second one should be a normal assignation, as no barrier is needed. Fixes: 18367681 ("ipv6 flowlabel: Convert np->ipv6_fl_list to RCU.") Reported-by:
Dave Jones <davej@codemonkey.org.uk> Signed-off-by:
-
subashab@codeaurora.org authored
[ Upstream commit 16186a82 ] A rcu stall with the following backtrace was seen on a system with forwarding, optimistic_dad and use_optimistic set. To reproduce, set these flags and allow ipv6 autoconf. This occurs because the device write_lock is acquired while already holding the read_lock. Back trace below - INFO: rcu_preempt self-detected stall on CPU { 1} (t=2100 jiffies g=3992 c=3991 q=4471) <6> Task dump for CPU 1: <2> kworker/1:0 R running task 12168 15 2 0x00000002 <2> Workqueue: ipv6_addrconf addrconf_dad_work <6> Call trace: <2> [<ffffffc000084da8>] el1_irq+0x68/0xdc <2> [<ffffffc000cc4e0c>] _raw_write_lock_bh+0x20/0x30 <2> [<ffffffc000bc5dd8>] __ipv6_dev_ac_inc+0x64/0x1b4 <2> [<ffffffc000bcbd2c>] addrconf_join_anycast+0x9c/0xc4 <2> [<ffffffc000bcf9f0>] __ipv6_ifa_notify+0x160/0x29c <2> [<ffffffc000bcfb7c>] ipv6_ifa_notify+0x50/0x70 <2> [<ffffffc000bd035c>] addrconf_dad_work+0x314/0x334 <2> [<ffffffc0000b64c8>] process_one_work+0x244/0x3fc <2> [<ffffffc0000b7324>] worker_thread+0x2f8/0x418 <2> [<ffffffc0000bb40c>] kthread+0xe0/0xec v2: do addrconf_dad_kick inside read lock and then acquire write lock for ipv6_ifa_notify as suggested by Eric Fixes: 7fd2561e ("net: ipv6: Add a sysctl to make optimistic addresses useful candidates") Cc: Eric Dumazet <edumazet@google.com> Cc: Erik Kline <ek@google.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Acked-by:
-
Paolo Abeni authored
[ Upstream commit 1cdda918 ] Currently, the egress interface index specified via IPV6_PKTINFO is ignored by __ip6_datagram_connect(), so that RFC 3542 section 6.7 can be subverted when the user space application calls connect() before sendmsg(). Fix it by initializing properly flowi6_oif in connect() before performing the route lookup. Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Acked-by:
-
Paolo Abeni authored
[ Upstream commit 6f21c96a ] The current implementation of ip6_dst_lookup_tail basically ignore the egress ifindex match: if the saddr is set, ip6_route_output() purposefully ignores flowi6_oif, due to the commit d46a9d67 ("net: ipv6: Dont add RT6_LOOKUP_F_IFACE flag if saddr set"), if the saddr is 'any' the first route lookup in ip6_dst_lookup_tail fails, but upon failure a second lookup will be performed with saddr set, thus ignoring the ifindex constraint. This commit adds an output route lookup function variant, which allows the caller to specify lookup flags, and modify ip6_dst_lookup_tail() to enforce the ifindex match on the second lookup via said helper. ip6_route_output() becames now a static inline function build on top of ip6_route_output_flags(); as a side effect, out-of-tree modules need now a GPL license to access the output route lookup functionality. Signed-off-by:
David Ahern <dsa@cumulusnetworks.com> Signed-off-by:
-
Eric Dumazet authored
[ Upstream commit ff5d7497 ] With some combinations of user provided flags in netlink command, it is possible to call tcp_get_info() with a buffer that is not 8-bytes aligned. It does matter on some arches, so we need to use put_unaligned() to store the u64 fields. Current iproute2 package does not trigger this particular issue. Fixes: 0df48c26 ("tcp: add tcpi_bytes_acked to tcp_info") Fixes: 977cb0ec ("tcp: add pacing_rate information into tcp_info") Signed-off-by:
-
Ido Schimmel authored
[ Upstream commit 4f2c6ae5 ] When switchdev drivers process FDB notifications from the underlying device they resolve the netdev to which the entry points to and notify the bridge using the switchdev notifier. However, since the RTNL mutex is not held there is nothing preventing the netdev from disappearing in the middle, which will cause br_switchdev_event() to dereference a non-existing netdev. Make switchdev drivers hold the lock at the beginning of the notification processing session and release it once it ends, after notifying the bridge. Also, remove switchdev_mutex and fdb_lock, as they are no longer needed when RTNL mutex is held. Fixes: 03bf0c28 ("switchdev: introduce switchdev notifier") Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
-
Joe Stringer authored
[ Upstream commit 8282f274 ] Later parts of the stack (including fragmentation) expect that there is never a socket attached to frag in a frag_list, however this invariant was not enforced on all defrag paths. This could lead to the BUG_ON(skb->sk) during ip_do_fragment(), as per the call stack at the end of this commit message. While the call could be added to openvswitch to fix this particular error, the head and tail of the frags list are already orphaned indirectly inside ip_defrag(), so it seems like the remaining fragments should all be orphaned in all circumstances. kernel BUG at net/ipv4/ip_output.c:586! [...] Call Trace: <IRQ> [<ffffffffa0205270>] ? do_output.isra.29+0x1b0/0x1b0 [openvswitch] [<ffffffffa02167a7>] ovs_fragment+0xcc/0x214 [openvswitch] [<ffffffff81667830>] ? dst_discard_out+0x20/0x20 [<ffffffff81667810>] ? dst_ifdown+0x80/0x80 [<ffffffffa0212072>] ? find_bucket.isra.2+0x62/0x70 [openvswitch] [<ffffffff810e0ba5>] ? mod_timer_pending+0x65/0x210 [<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90 [<ffffffffa03205a2>] ? nf_conntrack_in+0x252/0x500 [nf_conntrack] [<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70 [<ffffffffa02051a3>] do_output.isra.29+0xe3/0x1b0 [openvswitch] [<ffffffffa0206411>] do_execute_actions+0xe11/0x11f0 [openvswitch] [<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70 [<ffffffffa0206822>] ovs_execute_actions+0x32/0xd0 [openvswitch] [<ffffffffa020b505>] ovs_dp_process_packet+0x85/0x140 [openvswitch] [<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70 [<ffffffffa02068a2>] ovs_execute_actions+0xb2/0xd0 [openvswitch] [<ffffffffa020b505>] ovs_dp_process_packet+0x85/0x140 [openvswitch] [<ffffffffa0215019>] ? ovs_ct_get_labels+0x49/0x80 [openvswitch] [<ffffffffa0213a1d>] ovs_vport_receive+0x5d/0xa0 [openvswitch] [<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90 [<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90 [<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90 [<ffffffffa0214895>] ? internal_dev_xmit+0x5/0x140 [openvswitch] [<ffffffffa02148fc>] internal_dev_xmit+0x6c/0x140 [openvswitch] [<ffffffffa0214895>] ? internal_dev_xmit+0x5/0x140 [openvswitch] [<ffffffff81660299>] dev_hard_start_xmit+0x2b9/0x5e0 [<ffffffff8165fc21>] ? netif_skb_features+0xd1/0x1f0 [<ffffffff81660f20>] __dev_queue_xmit+0x800/0x930 [<ffffffff81660770>] ? __dev_queue_xmit+0x50/0x930 [<ffffffff810b53f1>] ? mark_held_locks+0x71/0x90 [<ffffffff81669876>] ? neigh_resolve_output+0x106/0x220 [<ffffffff81661060>] dev_queue_xmit+0x10/0x20 [<ffffffff816698e8>] neigh_resolve_output+0x178/0x220 [<ffffffff816a8e6f>] ? ip_finish_output2+0x1ff/0x590 [<ffffffff816a8e6f>] ip_finish_output2+0x1ff/0x590 [<ffffffff816a8cee>] ? ip_finish_output2+0x7e/0x590 [<ffffffff816a9a31>] ip_do_fragment+0x831/0x8a0 [<ffffffff816a8c70>] ? ip_copy_metadata+0x1b0/0x1b0 [<ffffffff816a9ae3>] ip_fragment.constprop.49+0x43/0x80 [<ffffffff816a9c9c>] ip_finish_output+0x17c/0x340 [<ffffffff8169a6f4>] ? nf_hook_slow+0xe4/0x190 [<ffffffff816ab4c0>] ip_output+0x70/0x110 [<ffffffff816a9b20>] ? ip_fragment.constprop.49+0x80/0x80 [<ffffffff816aa9f9>] ip_local_out+0x39/0x70 [<ffffffff816abf89>] ip_send_skb+0x19/0x40 [<ffffffff816abfe3>] ip_push_pending_frames+0x33/0x40 [<ffffffff816df21a>] icmp_push_reply+0xea/0x120 [<ffffffff816df93d>] icmp_reply.constprop.23+0x1ed/0x230 [<ffffffff816df9ce>] icmp_echo.part.21+0x4e/0x50 [<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70 [<ffffffff810d5f9e>] ? rcu_read_lock_held+0x5e/0x70 [<ffffffff816dfa06>] icmp_echo+0x36/0x70 [<ffffffff816e0d11>] icmp_rcv+0x271/0x450 [<ffffffff816a4ca7>] ip_local_deliver_finish+0x127/0x3a0 [<ffffffff816a4bc1>] ? ip_local_deliver_finish+0x41/0x3a0 [<ffffffff816a5160>] ip_local_deliver+0x60/0xd0 [<ffffffff816a4b80>] ? ip_rcv_finish+0x560/0x560 [<ffffffff816a46fd>] ip_rcv_finish+0xdd/0x560 [<ffffffff816a5453>] ip_rcv+0x283/0x3e0 [<ffffffff810b6302>] ? match_held_lock+0x192/0x200 [<ffffffff816a4620>] ? inet_del_offload+0x40/0x40 [<ffffffff8165d062>] __netif_receive_skb_core+0x392/0xae0 [<ffffffff8165e68e>] ? process_backlog+0x8e/0x230 [<ffffffff810b53f1>] ? mark_held_locks+0x71/0x90 [<ffffffff8165d7c8>] __netif_receive_skb+0x18/0x60 [<ffffffff8165e678>] process_backlog+0x78/0x230 [<ffffffff8165e6dd>] ? process_backlog+0xdd/0x230 [<ffffffff8165e355>] net_rx_action+0x155/0x400 [<ffffffff8106b48c>] __do_softirq+0xcc/0x420 [<ffffffff816a8e87>] ? ip_finish_output2+0x217/0x590 [<ffffffff8178e78c>] do_softirq_own_stack+0x1c/0x30 <EOI> [<ffffffff8106b88e>] do_softirq+0x4e/0x60 [<ffffffff8106b948>] __local_bh_enable_ip+0xa8/0xb0 [<ffffffff816a8eb0>] ip_finish_output2+0x240/0x590 [<ffffffff816a9a31>] ? ip_do_fragment+0x831/0x8a0 [<ffffffff816a9a31>] ip_do_fragment+0x831/0x8a0 [<ffffffff816a8c70>] ? ip_copy_metadata+0x1b0/0x1b0 [<ffffffff816a9ae3>] ip_fragment.constprop.49+0x43/0x80 [<ffffffff816a9c9c>] ip_finish_output+0x17c/0x340 [<ffffffff8169a6f4>] ? nf_hook_slow+0xe4/0x190 [<ffffffff816ab4c0>] ip_output+0x70/0x110 [<ffffffff816a9b20>] ? ip_fragment.constprop.49+0x80/0x80 [<ffffffff816aa9f9>] ip_local_out+0x39/0x70 [<ffffffff816abf89>] ip_send_skb+0x19/0x40 [<ffffffff816abfe3>] ip_push_pending_frames+0x33/0x40 [<ffffffff816d55d3>] raw_sendmsg+0x7d3/0xc30 [<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90 [<ffffffff816e7557>] ? inet_sendmsg+0xc7/0x1d0 [<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70 [<ffffffff816e759a>] inet_sendmsg+0x10a/0x1d0 [<ffffffff816e7495>] ? inet_sendmsg+0x5/0x1d0 [<ffffffff8163e398>] sock_sendmsg+0x38/0x50 [<ffffffff8163ec5f>] ___sys_sendmsg+0x25f/0x270 [<ffffffff811aadad>] ? handle_mm_fault+0x8dd/0x1320 [<ffffffff8178c147>] ? _raw_spin_unlock+0x27/0x40 [<ffffffff810529b2>] ? __do_page_fault+0x1e2/0x460 [<ffffffff81204886>] ? __fget_light+0x66/0x90 [<ffffffff8163f8e2>] __sys_sendmsg+0x42/0x80 [<ffffffff8163f932>] SyS_sendmsg+0x12/0x20 [<ffffffff8178cb17>] entry_SYSCALL_64_fastpath+0x12/0x6f Code: 00 00 44 89 e0 e9 7c fb ff ff 4c 89 ff e8 e7 e7 ff ff 41 8b 9d 80 00 00 00 2b 5d d4 89 d8 c1 f8 03 0f b7 c0 e9 33 ff ff f 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 55 48 RIP [<ffffffff816a9a92>] ip_do_fragment+0x892/0x8a0 RSP <ffff88006d603170> Fixes: 7f8a436e ("openvswitch: Add conntrack action") Signed-off-by:
Joe Stringer <joe@ovn.org> Signed-off-by:
-
Parthasarathy Bhuvaragan authored
[ Upstream commit 4d5cfcba ] In 'commit 7fe8097c ("tipc: fix nullpointer bug when subscribing to events")', we terminate the connection if the subscription creation fails. In the same commit, the subscription creation result was based on the value of the subscription pointer (set in the function) instead of the return code. Unfortunately, the same function tipc_subscrp_create() handles subscription cancel request. For a subscription cancellation request, the subscription pointer cannot be set. Thus if a subscriber has several subscriptions and cancels any of them, the connection is terminated. In this commit, we terminate the connection based on the return value of tipc_subscrp_create(). Fixes: commit 7fe8097c ("tipc: fix nullpointer bug when subscribing to events") Reviewed-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Signed-off-by:
-
Russell King authored
[ Upstream commit db0e51af ] Since commit 76e398a6 ("net: dsa: use switchdev obj for VLAN add/del ops"), the Marvell 88E6xxx switch has been unable to pass traffic between ports - any received traffic is discarded by the switch. Taking a port out of bridge mode and configuring a vlan on it also the port to start passing traffic. With the debugfs files re-instated to allow debug of this issue by comparing the register settings between the working and non-working case, the reason becomes clear: GLOBAL GLOBAL2 SERDES 0 1 2 3 4 5 6 - 7: 1111 707f 2001 2 2 2 2 2 0 2 + 7: 1111 707f 2001 1 1 1 1 1 0 1 Register 7 for the ports is the default vlan tag register, and in the non-working setup, it has been set to 2, despite vlan 2 not being configured. This causes the switch to drop all packets coming in to these ports. The working setup has the default vlan tag register set to 1, which is the default vlan when none is configured. Inspection of the code reveals why. The code prior to this commit was: - for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) { ... - if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID) - err = ds->drv->port_pvid_set(ds, p->port, vid); but the new code is: + for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) { ... + } ... + if (pvid) + err = _mv88e6xxx_port_pvid_set(ds, port, vid); This causes the new code to always set the default vlan to one higher than the old code. Fix this. Fixes: 76e398a6 ("net: dsa: use switchdev obj for VLAN add/del ops") Cc: <stable@vger.kernel.org> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
-
Marcelo Ricardo Leitner authored
[ Upstream commit 27f7ed2b ] This patch extends commit b93d6471 ("sctp: implement the sender side for SACK-IMMEDIATELY extension") as it didn't white list SCTP_SACK_IMMEDIATELY on sctp_msghdr_parse(), causing it to be understood as an invalid flag and returning -EINVAL to the application. Note that the actual handling of the flag is already there in sctp_datamsg_from_user(). https://tools.ietf.org/html/rfc7053#section-7 Fixes: b93d6471 ("sctp: implement the sender side for SACK-IMMEDIATELY extension") Signed-off-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by:
Vlad Yasevich <vyasevich@gmail.com> Signed-off-by:
-
Hannes Frederic Sowa authored
[ Upstream commit 9a368aff ] Several times already this has been reported as kasan reports caused by syzkaller and trinity and people always looked at RCU races, but it is much more simple. :) In case we bind a pptp socket multiple times, we simply add it to the callid_sock list but don't remove the old binding. Thus the old socket stays in the bucket with unused call_id indexes and doesn't get cleaned up. This causes various forms of kasan reports which were hard to pinpoint. Simply don't allow multiple binds and correct error handling in pptp_bind. Also keep sk_state bits in place in pptp_connect. Fixes: 00959ade ("PPTP: PPP over IPv4 (Point-to-Point Tunneling Protocol)") Cc: Dmitry Kozlov <xeb@mail.ru> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Dmitry Vyukov <dvyukov@google.com> Reported-by:
Dmitry Vyukov <dvyukov@google.com> Cc: Dave Jones <davej@codemonkey.org.uk> Reported-by:
-
Eric Dumazet authored
[ Upstream commit fa0dc04d ] Dmitry reported a struct pid leak detected by a syzkaller program. Bug happens in unix_stream_recvmsg() when we break the loop when a signal is pending, without properly releasing scm. Fixes: b3ca9b02 ("net: fix multithreaded signal handling in unix recv routines") Reported-by:
-
Eric Dumazet authored
[ Upstream commit e62a123b ] Neal reported crashes with this stack trace : RIP: 0010:[<ffffffff8c57231b>] tcp_v4_send_ack+0x41/0x20f ... CR2: 0000000000000018 CR3: 000000044005c000 CR4: 00000000001427e0 ... [<ffffffff8c57258e>] tcp_v4_reqsk_send_ack+0xa5/0xb4 [<ffffffff8c1a7caa>] tcp_check_req+0x2ea/0x3e0 [<ffffffff8c19e420>] tcp_rcv_state_process+0x850/0x2500 [<ffffffff8c1a6d21>] tcp_v4_do_rcv+0x141/0x330 [<ffffffff8c56cdb2>] sk_backlog_rcv+0x21/0x30 [<ffffffff8c098bbd>] tcp_recvmsg+0x75d/0xf90 [<ffffffff8c0a8700>] inet_recvmsg+0x80/0xa0 [<ffffffff8c17623e>] sock_aio_read+0xee/0x110 [<ffffffff8c066fcf>] do_sync_read+0x6f/0xa0 [<ffffffff8c0673a1>] SyS_read+0x1e1/0x290 [<ffffffff8c5ca262>] system_call_fastpath+0x16/0x1b The problem here is the skb we provide to tcp_v4_send_ack() had to be parked in the backlog of a new TCP fastopen child because this child was owned by the user at the time an out of window packet arrived. Before queuing a packet, TCP has to set skb->dev to NULL as the device could disappear before packet is removed from the queue. Fix this issue by using the net pointer provided by the socket (being a timewait or a request socket). IPv6 is immune to the bug : tcp_v6_send_response() already gets the net pointer from the socket if provided. Fixes: 168a8f58 ("tcp: TCP Fast Open Server - main code path") Reported-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
-
Paolo Abeni authored
[ Upstream commit c868ee70 ] the commit 35e2d115 ("tunnels: Allow IPv6 UDP checksums to be correctly controlled.") changed the default xmit checksum setting for lwt vxlan/geneve ipv6 tunnels, so that now the checksum is not set into external UDP header. This commit changes the rx checksum setting for both lwt vxlan/geneve devices created by openvswitch accordingly, so that lwt over ipv6 tunnel pairs are again able to communicate with default values. Signed-off-by:
Jiri Benc <jbenc@redhat.com> Acked-by:
Jesse Gross <jesse@kernel.org> Signed-off-by:
-
Jesse Gross authored
[ Upstream commit 35e2d115 ] When configuring checksums on UDP tunnels, the flags are different for IPv4 vs. IPv6 (and reversed). However, when lightweight tunnels are enabled the flags used are always the IPv4 versions, which are ignored in the IPv6 code paths. This uses the correct IPv6 flags, so checksums can be controlled appropriately. Fixes: a725e514 ("vxlan: metadata based tunneling for IPv6") Fixes: abe492b4 ("geneve: UDP checksum configuration via netlink") Signed-off-by:
-
Manfred Rudigier authored
[ Upstream commit 81e8f2e9 ] PHY status frames are not reliable, the PHY may not be able to send them during heavy receive traffic. This overflow condition is signaled by the PHY in the next status frame, but the driver did not make use of it. Instead it always reported wrong tx timestamps to user space after an overflow happened because it assigned newly received tx timestamps to old packets in the queue. This commit fixes this issue by clearing the tx timestamp queue every time an overflow happens, so that no timestamps are delivered for overflow packets. This way time stamping will continue correctly after an overflow. Signed-off-by:
Manfred Rudigier <manfred.rudigier@omicron.at> Acked-by:
Richard Cochran <richardcochran@gmail.com> Signed-off-by:
-
Jesse Gross authored
[ Upstream commit ce87fc6c ] GRO is currently not aware of tunnel metadata generated by lightweight tunnels and stored in the dst. This leads to two possible problems: * Incorrectly merging two frames that have different metadata. * Leaking of allocated metadata from merged frames. This avoids those problems by comparing the tunnel information before merging, similar to how we handle other metadata (such as vlan tags), and releasing any state when we are done. Reported-by:
John <john.phillips5@hpe.com> Fixes: 2e15ea39 ("ip_gre: Add support to collect tunnel metadata.") Signed-off-by:
Thomas Graf <tgraf@suug.ch> Signed-off-by:
-
Ursula Braun authored
[ Upstream commit 52a82e23 ] Signed-off-by:
Ursula Braun <ursula.braun@de.ibm.com> Reported-by:
Evgeny Cherkashin <Eugene.Crosser@ru.ibm.com> Signed-off-by:
-
- 25 Feb, 2016 18 commits
-
-
Greg Kroah-Hartman authored
-
Luis R. Rodriguez authored
commit 4355efbd upstream. Commit f2411da7 ("driver-core: add driver module asynchronous probe support") added async probe support, in two forms: * in-kernel driver specification annotation * generic async_probe module parameter (modprobe foo async_probe) To support the generic kernel parameter parse_args() was extended via commit ecc86170 ("module: add extra argument for parse_params() callback") however commit failed to f2411da7 failed to add the required argument. This causes a crash then whenever async_probe generic module parameter is used. This was overlooked when the form in which in-kernel async probe support was reworked a bit... Fix this as originally intended. Cc: Hannes Reinecke <hare@suse.de> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
Luis R. Rodriguez <mcgrof@suse.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> [minimized] Signed-off-by:
-
Rusty Russell authored
commit 2e7bac53 upstream. This trivial wrapper adds clarity and makes the following patch smaller. Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
-
Thomas Gleixner authored
commit 51cbb524 upstream. As Helge reported for timerfd we have the same issue in itimers. We return remaining time larger than the programmed relative time to user space in case of CONFIG_TIME_LOW_RES=y. Use the proper function to adjust the extra time added in hrtimer_start_range_ns(). Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Helge Deller <deller@gmx.de> Cc: John Stultz <john.stultz@linaro.org> Cc: linux-m68k@lists.linux-m68k.org Cc: dhowells@redhat.com Link: http://lkml.kernel.org/r/20160114164159.528222587@linutronix.deSigned-off-by:
-
Thomas Gleixner authored
commit 572c3917 upstream. As Helge reported for timerfd we have the same issue in posix timers. We return remaining time larger than the programmed relative time to user space in case of CONFIG_TIME_LOW_RES=y. Use the proper function to adjust the extra time added in hrtimer_start_range_ns(). Signed-off-by:
-
Thomas Gleixner authored
commit b62526ed upstream. Helge reported that a relative timer can return a remaining time larger than the programmed relative time on parisc and other architectures which have CONFIG_TIME_LOW_RES set. This happens because we add a jiffie to the resulting expiry time to prevent short timeouts. Use the new function hrtimer_expires_remaining_adjusted() to calculate the remaining time. It takes that extra added time into account for relative timers. Reported-and-tested-by:
Helge Deller <deller@gmx.de> Signed-off-by:
-
Mateusz Guzik authored
commit ddf1d398 upstream. An unprivileged user can trigger an oops on a kernel with CONFIG_CHECKPOINT_RESTORE. proc_pid_cmdline_read takes mmap_sem for reading and obtains args + env start/end values. These get sanity checked as follows: BUG_ON(arg_start > arg_end); BUG_ON(env_start > env_end); These can be changed by prctl_set_mm. Turns out also takes the semaphore for reading, effectively rendering it useless. This results in: kernel BUG at fs/proc/base.c:240! invalid opcode: 0000 [#1] SMP Modules linked in: virtio_net CPU: 0 PID: 925 Comm: a.out Not tainted 4.4.0-rc8-next-20160105dupa+ #71 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 task: ffff880077a68000 ti: ffff8800784d0000 task.ti: ffff8800784d0000 RIP: proc_pid_cmdline_read+0x520/0x530 RSP: 0018:ffff8800784d3db8 EFLAGS: 00010206 RAX: ffff880077c5b6b0 RBX: ffff8800784d3f18 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 00007f78e8857000 RDI: 0000000000000246 RBP: ffff8800784d3e40 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000050 R13: 00007f78e8857800 R14: ffff88006fcef000 R15: ffff880077c5b600 FS: 00007f78e884a740(0000) GS:ffff88007b200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007f78e8361770 CR3: 00000000790a5000 CR4: 00000000000006f0 Call Trace: __vfs_read+0x37/0x100 vfs_read+0x82/0x130 SyS_read+0x58/0xd0 entry_SYSCALL_64_fastpath+0x12/0x76 Code: 4c 8b 7d a8 eb e9 48 8b 9d 78 ff ff ff 4c 8b 7d 90 48 8b 03 48 39 45 a8 0f 87 f0 fe ff ff e9 d1 fe ff ff 4c 8b 7d 90 eb c6 0f 0b <0f> 0b 0f 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 RIP proc_pid_cmdline_read+0x520/0x530 ---[ end trace 97882617ae9c6818 ]--- Turns out there are instances where the code just reads aformentioned values without locking whatsoever - namely environ_read and get_cmdline. Interestingly these functions look quite resilient against bogus values, but I don't believe this should be relied upon. The first patch gets rid of the oops bug by grabbing mmap_sem for writing. The second patch is optional and puts locking around aformentioned consumers for safety. Consumers of other fields don't seem to benefit from similar treatment and are left untouched. This patch (of 2): The code was taking the semaphore for reading, which does not protect against readers nor concurrent modifications. The problem could cause a sanity checks to fail in procfs's cmdline reader, resulting in an OOPS. Note that some functions perform an unlocked read of various mm fields, but they seem to be fine despite possible modificaton. Signed-off-by:
Mateusz Guzik <mguzik@redhat.com> Acked-by:
Cyrill Gorcunov <gorcunov@openvz.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Jarod Wilson <jarod@redhat.com> Cc: Jan Stancek <jstancek@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Anshuman Khandual <anshuman.linux@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
-
Dave Chinner authored
commit 85bec546 upstream. Recently I've been seeing xfs/051 fail on 1k block size filesystems. Trying to trace the events during the test lead to the problem going away, indicating that it was a race condition that lead to this ASSERT failure: XFS: Assertion failed: atomic_read(&pag->pag_ref) == 0, file: fs/xfs/xfs_mount.c, line: 156 ..... [<ffffffff814e1257>] xfs_free_perag+0x87/0xb0 [<ffffffff814e21b9>] xfs_mountfs+0x4d9/0x900 [<ffffffff814e5dff>] xfs_fs_fill_super+0x3bf/0x4d0 [<ffffffff811d8800>] mount_bdev+0x180/0x1b0 [<ffffffff814e3ff5>] xfs_fs_mount+0x15/0x20 [<ffffffff811d90a8>] mount_fs+0x38/0x170 [<ffffffff811f4347>] vfs_kern_mount+0x67/0x120 [<ffffffff811f7018>] do_mount+0x218/0xd60 [<ffffffff811f7e5b>] SyS_mount+0x8b/0xd0 When I finally caught it with tracing enabled, I saw that AG 2 had an elevated reference count and a buffer was responsible for it. I tracked down the specific buffer, and found that it was missing the final reference count release that would put it back on the LRU and hence be found by xfs_wait_buftarg() calls in the log mount failure handling. The last four traces for the buffer before the assert were (trimmed for relevance) kworker/0:1-5259 xfs_buf_iodone: hold 2 lock 0 flags ASYNC kworker/0:1-5259 xfs_buf_ioerror: hold 2 lock 0 error -5 mount-7163 xfs_buf_lock_done: hold 2 lock 0 flags ASYNC mount-7163 xfs_buf_unlock: hold 2 lock 1 flags ASYNC This is an async write that is completing, so there's nobody waiting for it directly. Hence we call xfs_buf_relse() once all the processing is complete. That does: static inline void xfs_buf_relse(xfs_buf_t *bp) { xfs_buf_unlock(bp); xfs_buf_rele(bp); } Now, it's clear that mount is waiting on the buffer lock, and that it has been released by xfs_buf_relse() and gained by mount. This is expected, because at this point the mount process is in xfs_buf_delwri_submit() waiting for all the IO it submitted to complete. The mount process, however, is waiting on the lock for the buffer because it is in xfs_buf_delwri_submit(). This waits for IO completion, but it doesn't wait for the buffer reference owned by the IO to go away. The mount process collects all the completions, fails the log recovery, and the higher level code then calls xfs_wait_buftarg() to free all the remaining buffers in the filesystem. The issue is that on unlocking the buffer, the scheduler has decided that the mount process has higher priority than the the kworker thread that is running the IO completion, and so immediately switched contexts to the mount process from the semaphore unlock code, hence preventing the kworker thread from finishing the IO completion and releasing the IO reference to the buffer. Hence by the time that xfs_wait_buftarg() is run, the buffer still has an active reference and so isn't on the LRU list that the function walks to free the remaining buffers. Hence we miss that buffer and continue onwards to tear down the mount structures, at which time we get find a stray reference count on the perag structure. On a non-debug kernel, this will be ignored and the structure torn down and freed. Hence when the kworker thread is then rescheduled and the buffer released and freed, it will access a freed perag structure. The problem here is that when the log mount fails, we still need to quiesce the log to ensure that the IO workqueues have returned to idle before we run xfs_wait_buftarg(). By synchronising the workqueues, we ensure that all IO completions are fully processed, not just to the point where buffers have been unlocked. This ensures we don't end up in the situation above. Signed-off-by:
Dave Chinner <dchinner@redhat.com> Reviewed-by:
Brian Foster <bfoster@redhat.com> Signed-off-by:
Dave Chinner <david@fromorbit.com> Signed-off-by:
-
Dave Chinner authored
commit 3e85286e upstream. This reverts commit 24ba16bb as it prevents machines from suspending. This regression occurs when the xfsaild is idle on entry to suspend, and so there s no activity to wake it from it's idle sleep and hence see that it is supposed to freeze. Hence the freezer times out waiting for it and suspend is cancelled. There is no obvious fix for this short of freezing the filesystem properly, so revert this change for now. Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Reviewed-by:
-
Dave Chinner authored
commit b79f4a1c upstream. When we do inode readahead in log recovery, we do can do the readahead before we've replayed the icreate transaction that stamps the buffer with inode cores. The inode readahead verifier catches this and marks the buffer as !done to indicate that it doesn't yet contain valid inodes. In adding buffer error notification (i.e. setting b_error = -EIO at the same time as as we clear the done flag) to such a readahead verifier failure, we can then get subsequent inode recovery failing with this error: XFS (dm-0): metadata I/O error: block 0xa00060 ("xlog_recover_do..(read#2)") error 5 numblks 32 This occurs when readahead completion races with icreate item replay such as: inode readahead find buffer lock buffer submit RA io .... icreate recovery xfs_trans_get_buffer find buffer lock buffer <blocks on RA completion> ..... <ra completion> fails verifier clear XBF_DONE set bp->b_error = -EIO release and unlock buffer <icreate gains lock> icreate initialises buffer marks buffer as done adds buffer to delayed write queue releases buffer At this point, we have an initialised inode buffer that is up to date but has an -EIO state registered against it. When we finally get to recovering an inode in that buffer: inode item recovery xfs_trans_read_buffer find buffer lock buffer sees XBF_DONE is set, returns buffer sees bp->b_error is set fail log recovery! Essentially, we need xfs_trans_get_buf_map() to clear the error status of the buffer when doing a lookup. This function returns uninitialised buffers, so the buffer returned can not be in an error state and none of the code that uses this function expects b_error to be set on return. Indeed, there is an ASSERT(!bp->b_error); in the transaction case in xfs_trans_get_buf_map() that would have caught this if log recovery used transactions.... This patch firstly changes the inode readahead failure to set -EIO on the buffer, and secondly changes xfs_buf_get_map() to never return a buffer with an error state set so this first change doesn't cause unexpected log recovery failures. Signed-off-by:
-
Darrick J. Wong authored
commit 96f859d5 upstream. Because struct xfs_agfl is 36 bytes long and has a 64-bit integer inside it, gcc will quietly round the structure size up to the nearest 64 bits -- in this case, 40 bytes. This results in the XFS_AGFL_SIZE macro returning incorrect results for v5 filesystems on 64-bit machines (118 items instead of 119). As a result, a 32-bit xfs_repair will see garbage in AGFL item 119 and complain. Therefore, tell gcc not to pad the structure so that the AGFL size calculation is correct. Signed-off-by:
Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by:
-
Miklos Szeredi authored
commit cf9a6784 upstream. Without this copy-up of a file can be forced, even without actually being allowed to do anything on the file. [Arnd Bergmann] include <linux/pagemap.h> for PAGE_CACHE_SIZE (used by MAX_LFS_FILESIZE definition). Signed-off-by:
Miklos Szeredi <miklos@szeredi.hu> Signed-off-by:
-
Miklos Szeredi authored
commit ed06e069 upstream. We copy i_uid and i_gid of underlying inode into overlayfs inode. Except for the root inode. Fix this omission. Signed-off-by:
-
Konstantin Khlebnikov authored
commit 84889d49 upstream. This patch fixes kernel crash at removing directory which contains whiteouts from lower layers. Cache of directory content passed as "list" contains entries from all layers, including whiteouts from lower layers. So, lookup in upper dir (moved into work at this stage) will return negative entry. Plus this cache is filled long before and we can race with external removal. Example: mkdir -p lower0/dir lower1/dir upper work overlay touch lower0/dir/a lower0/dir/b mknod lower1/dir/a c 0 0 mount -t overlay none overlay -o lowerdir=lower1:lower0,upperdir=upper,workdir=work rm -fr overlay/dir Signed-off-by:
Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by:
-
Vito Caputo authored
commit e4ad29fa upstream. Rather than always allocating the high-order XATTR_SIZE_MAX buffer which is costly and prone to failure, only allocate what is needed and realloc if necessary. Fixes https://github.com/coreos/bugs/issues/489Signed-off-by:
-
Miklos Szeredi authored
commit 97daf8b9 upstream. When ovl_copy_xattr() encountered a zero size xattr no more xattrs were copied and the function returned success. This is clearly not the desired behavior. Signed-off-by:
-
Thomas Gleixner authored
commit fb75a428 upstream. If the proxy lock in the requeue loop acquires the rtmutex for a waiter then it acquired also refcount on the pi_state related to the futex, but the waiter side does not drop the reference count. Add the missing free_pi_state() call. Signed-off-by:
-
Toshi Kani authored
commit 9273a8bb upstream. The pmem driver calls devm_memremap() to map a persistent memory range. When the pmem driver is unloaded, this memremap'd range is not released so the kernel will leak a vma. Fix devm_memremap_release() to handle a given memremap'd address properly. Signed-off-by:
Toshi Kani <toshi.kani@hpe.com> Acked-by:
Dan Williams <dan.j.williams@intel.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Signed-off-by:
-
